Muffler



. 1,514,805 c. TAsso ET AL MUFFLER Filed Aug. 15. 1919 f6 1 A9 I /2 K? 6 7 1 Fig. 2.

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Patented Nov. 11, 1924.

UNITED STATES PATENT OFFICE.

CHARLES TASSO AND HUBER)? B. DALY, OF NEW YORK, N. Y.

MUFFLER.

Application filed August 15, 1919.

To all whom it may concem:

Be it known that we, CHARLES TASSO and Hunter B. DALY, citizens of the United States, residing at New York, in the county of New York and State of New York, have inventednew and useful Improvements in Mufiiers, of which the following is a specification.

This invention relates to improvements in mufiiers and has for its principal object to provide a muffler provided with a safetyvalve for permitting the escape of excess pressure and avoiding the destructive effects of explosion occurring within the muffier caused by what is termed a back fire.

Heretofore, in the construction of mufflers for motor vehicles it has been customary to provide a cylinder formed of a thin sheet metal shell arranged with a series of battles for breaking up and retarding the passage of the exhaust gases to avoid much of the noise usually accompanying the use of motor vehicles or internal combustion. engines.

It has been frequently experienced in the use of such mufflers that a back fire in the mufiler would cause the shell to be blown therefrom, thereby destroying the utility of the same and putting the user to considerable expense for the repair of the muffler.

As another object the present invention contemplates the provision of a mufiier constructed of cast metal which is designed to avoid the objections to the ordinary type of muffler and a back firing occurring within the same.

A more specific object of the invention is to provide a combination pressure relieve valve and cut-out which is designed to take care of any excess pressure occurring within the muflier, thereby materially reducing danger of injury to the muffler.

WVith these and other objects in view, the invention consists in the novel construction, combination and arrangement of parts which will be fully set forth in the following specification, claimed and illustrated in the accompanying drawing in which Figure 1 is a side view of a muflier constructed in accordance with this invention.

Figure 2 is an end view thereof, and

Figure 3 is a longitudinal sectional view through the device.

Referring to the drawings in detail, the numeral 5 designates in its entirety the Serial No. 317,784.

main body of the muffler provided with the i inlet and outlet nozzles 6 and 7, respectively. The main body consists of a pair of castings 8 and 9 which are of substantially circular formation and provided with mating flanges which when assembled form the entire muf fler. It will be understood that the castings 8 and 9 are provided with extensions, the edges of which are matched and arranged when assembled to provide the nozzles 6 and 7. Formed integrally with the nozzle 6 at a point near the mufiler 5 is a depending tubular extension 10 formed at its lower end with an annular valve seat 11, while a boss 12 is formed at a point diametrically opposite the extension 11 and is provided with an axial opening to receivethe valve stem which will be more fully hereinafter described. Formed on the castings 8 and 9 adjacent the boss 12 are upwardly extending ears 13 between which is pivotally mounted the valve actuating lever which will be more fully hereinafter described. The casting 8 is formed interiorly with a plurality of bafile plates 14 and 15 arranged preferably in the manner illustrated in Figure 3. It will be understood, however that these bafiie lates may be arranged at varying angles an may be modified to meet varying requirements without departing from the spirit and scope of the invention. These battles while extending well into the casting 9 terminate slightly short of the inner face of the side wall thereof in order to provide a clear passage through the device which materially assists in the conducting of exhaust gases therethrough and yet will not interfere with the effect of the bafiles in breaking up the gases and destroying the sound of the emission thereof As illustrated in Figure 2, the casting 9 is provided with a bracket 16 which may be attached to any portion of the chassis of a vehicle.

In order to close the opening through the extension 10, a valve 17 is arranged to seat on the valve seat 11 and this valve is provided with a stem 18 which extends through the boss 12 and is surrounded adjacent its outer end with a spring 19 bearing on a plate 20 which engages with a cotter pin 21 passing through said'stem. It will be understood that the opposite end of the spring 19 bears on the boss 12 and it will thus be seen that the valve 11 will be yieldably that the exhaust-gasesentering the motor directly over the outer: end: ofwthe valve stem 18 and it will be obvious that when pull -is exertedon the member 23, the lever will I be rocked thereb causin the valve to ooen.

lnniseg the device is connected to i the exhaustpipe of a' motor' vehicle by attaching the -nozzle 6 thereto and it will be obvious wi ll be broken upand the noise usually accompanying the emission of-said' gases will i36 PCluCGCl 'tO'a mllllnlllm. ,Should a back lire occur withinthe mufiler, -it will be obvious: that not only .willthegases be exhausted through the nozzle 7 but-they may also back into: the nozzle band due to the ehigh pressure thereof, the--tension of the spring l9==wi ll -beovercome thereby opening the valve Tandpermiitting the escape of the gases through the tubular extension 10. Shoiuld it-be desired to open the valve in the manner -of-an--ordinary out-out -asis fre- -=quent1y done {when negotiating a hill or harctpull in -order to relieve back pressure,

it w-i ll be obvious that the flexib-le member maybe pulledther'eby opening-the valve and avoiding the necessity of forcing the ex haustgases through the muffler.

While in the foregoing there has been shown and described, a preferred embodiment of this invention, it is to be understood that certain minor changes in the details of construction, combination and arrangement of parts may be resorted to without departingfrom the spirit and scope of the invention as claimed.

What is claimed as new -is A mu'fiier comprising a hollow circular i body: portion having vertical side walls, an inlet GXEBlflSlOIljfOIIIIGCl thereon at the top of said body portion, an outlet extension formed at the bottom of said body portion, battles formedintegral With'said body portion and projecting from the circular walls and terminating short of said vertical side WiLllS, the baffles of one side of said circular walls overlying the baffies ot the opposite side: to provide a passage way from the inlet extension to outlet extension, and a valve mounted in the inlet extension I and d1sposed at a right angle to the axis thereofand operable from a point distant "fromthe muiiler for relieving excess pressure in said body portion.

In testimony whereof we" haveaffixed our signatures. 1

GHARLES TASSO. HUBERT B. DALY. 

